from django.http import HttpResponse,HttpResponseRedirect
from polls.models import Poll,Choice
from django.template import RequestContext, loader
from django.http import Http404
from django.core.urlresolvers import reverse
from django.shortcuts import render, get_object_or_404
from django.views import generic

# Create your views here.

def index(request):
    latest_poll_list = Poll.objects.order_by('-pub_date')[:5]
    #output = ', '.join([p.question for p in latest_poll_list])
    # template = loader.get_template('polls/index.html')
    # context = RequestContext(request,{
        # 'latest_poll_list':latest_poll_list,
        # })
    # return HttpResponse(template.render(context))
    #"""Hello, world. You're at the poll index.<br/>
    #%s""" % output)
    context = {'latest_poll_list': latest_poll_list}
    return render(request,'polls/index.html',context)
    
def detail(request,poll_id):
    # try:
        # poll = Poll.objects.get(pk=poll_id)
    # except Poll.DoesNotExist:
        # raise Http404
    poll = get_object_or_404(Poll, pk=poll_id)
    return render(request, 'polls/detail.html', {'poll': poll})
    # return HttpResponse("You're looking at poll %s." % poll_id)
   
def vote(request, poll_id):
    p = get_object_or_404(Poll, pk=poll_id)
    try:
        selected_choice = p.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the poll voting form.
        return render(request, 'polls/detail.html', {
            'poll': p,
            'error_message': "You didn't select a choice.",
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        # Always return an HttpResponseRedirect after successfully dealing
        # with POST data. This prevents data from being posted twice if a
        # user hits the Back button.
        return HttpResponseRedirect(reverse('polls:results', args=(p.id,)))
        # return HttpResponse("You're voting on poll %s." % poll_id)

def results(request, poll_id):
    poll = get_object_or_404(Poll, pk=poll_id)
    return render(request, 'polls/results.html', {'poll': poll})
    # return HttpResponse("You're looking at the results of poll %s." % poll_id)
         
class IndexView(generic.ListView):
    template_name = 'polls/index.html'
    context_object_name = 'latest_poll_list'
    def get_queryset(self):
        """Return the last five published polls."""
        return Poll.objects.order_by('-pub_date')[:5]
class DetailView(generic.DetailView):
    model = Poll
    template_name = 'polls/detail.html'
class ResultsView(generic.DetailView):
    model = Poll
    template_name = 'polls/results.html'
    
    